Mitel SX 200 DIGITAL Pabx General Descriptions Manual

							Automatic Route Selection and Toll Control
4. DETAILED DESCRIPTION ’Introduction
4.01The ARS feature is part of the Generic 1003 software packages
of the SX-200 DIGITAL PABX, which automatically selects one
of a preprogrammed list of Trunk Routes every time an outgoing call is
made. The routes are selected via the digits dialed, in order of cost
(i.e., least expensive route first), and in accordance with the caller’s toll
restriction. The use of digit analysis and digit modification within the
ARS package allows the system to recognize and modify any digit
string which is dialed by the user, thus alleviating the need for the
user to dial special trunk access codes, or to dial a different digit
string for each of the various routes to the same destination.
4.02The complete ARS package provides the following:
0Alternative Routing
0Least Cost Routing
lToll Control
lOverlap Outpulsing
lExpensive Route Warning
0Callback Queueing
lCamp-on Queueing
0Return Dial Tone.
Alternative Routing
4.03Alternative Routing is the automatic selection of an alternate
Trunk Route when the first choice is busy. Routes (e.g., tie
trunks or WATS lines), are preprogrammed in an implied order within
the Route List Definition Table as described in paragraph 5.16.
Leakt Cost Routing
4.04Least Cost Routing enables the customer to capitalize on the
cost benefits offered by each type of trunk by allowing the
installation company to define, via the Route Plans and Route Lists
Tables, the order in which the Trunk Groups are to be selected. A
number of different Route Lists can be defined to account for the
fluctuation in rates with respect to the day and time of the week.
Route lists are associated with day and time zones through the pro-
gramming of the Day Zones and Route Plans Tables, described in
paragraphs 5.11 and 5.07.
Toll Control
4.05Toll Control is an integral part of the ARS feature package. It
allows the customer to restrict user access to specific Trunk
Routes and/or specific directory numbers.
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							SECTION MITLSI Q9-094-220~NA
4.06Every peripheral device‘which is capable of accessing a trunk is
assigned a class of restriction 
(COR). These CORs are arranged
within COR Groups, which are associated with Trunk Groups through
the programming of the Route Definition table. The Route Definition
table defines:(l) a trunk group, (2) how the digits dialed are to be
modified, and (3) which classes of restriction CANNOT access the
route. A maximum of 50 COR Groups, each containing a maximum of
25 COR members, can be programmed. A COR Group is simply a list
comprised of several COR members. Once constructed, the group is
assigned a number (1 to 50). This is the number used in route defini-
tion.
L
4.07Toli control takes place in the following way. Each time a trunk
call is initiated, the system checks that the COR of the originat-
ing device is NOT included in the COR Group assigned to the selected
trunk route, thus verifying that the call is toll allowed (that is, the user
is authorized to make the call).
4.08CORs are assigned to peripheral devices during the initial sys-
tem programming, in accordance with the customer’s require-
ments, and can be modified at any time from an attendant workstation
or CDE terminal by the proper authority (e.g., the telephone manager).
Overlap Outpulsing
4.09The basic principle of overlap outpulsing is to seize a trunk and
commence outpulsing as soon as sufficient digits have been
received to identify the route. This is necessary in order to minimize
the post-dialing delay which would otherwise be experienced due to
the serialization of digit collection, trunk seizure, and digit outpulsing.
The number of digits collected prior to outpulsing can be programmed
by the customer during Customer Data Entry (CDE). These digits may
be subject to digit modification prior to being passed to the appro-
priate sender (dial pulse or DTMF) for outpulsing. Subsequent digits are
collected by the system and are outpulsed. At the end of dialing,
indicated by an interdigit time-out, or the dialing of a complete digit
string of known length, the dialing sender is disconnected. System
Option 26 (No Overlap Outpulsing) inhibits overlap outpulsing for all
calls.
When overlap outpulsing is used, ARS destinations must not have
conflicting length differences. Such conflicts will cause the first match
to be used, not the best or specified match. If the following ARS
example is used with overlap outpulsing, the first match on 95 will
always select route 2; route 1 will never be selected.
Leading DigitsDigits to Analyse
Route
9561
952
4.10The post-dialing delay (i.e., the time lapse between the comple-
tion of station dialing and the receipt of ringback) which would
be experienced when using a DTMF trunk, is minimum (slightly more
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							Automatic Route Selection and Toll Control
than 1 second for a IO-digit number). If no overlap outpulsing is
enabled, the delay for a lo-digit number outpulsed over a dial pulse
trunk would be approximately 16 seconds at 10 PPS.4.11Trunk Routes are seized only after the ARS process has deter-
mined the validity of the call with respect to the caller’s class
of restriction. In this way, false traffic will not be generated at the CO
(or distant PABX) by aborted seizures.
Expensive Route Warning Tone
4.12The Expensive Route Warning Tone is a programmable option
which presents a tone to the user during call setup, and, if a
SUPERSET qTM or SUPERSET 4TMDN telephone is used, the message
“EXPENSIVE ROUTE” appears on the LCD, when the Route selected by
ARS is programmed as an expensive route. Any Route but the first may
be programmed to deliver an Expensive Route Warning Tone. When
alerted by the warning, the user then has the option of deciding
whether or not to continue the call.
Callback Queueing
4.13Callback Queueing (Automatic Callback) allows a user who en-
counters busy tone after dialing an ARS digit string (i.e., all
trunks busy) to dial a callback access code, or, if a 
SUPERSET 4 or
SUPERSET 4DN telephone is used, to select CALLBACK, and be placed
in a queue for the first available trunk. When a trunk becomes free, it
will be seized, the originating device will be rung back, and, when
answered, the previously entered digits ‘will be automatically 
out-pulsed. When honouring a callback, expensive Route choices are
skipped when ARS scans for an available trunk.
Camp-on Queueing
4.14Camp-on Queueing allows the user who 
.encounters busy tone .
after dialing an ARS digit string (i.e., all trunks busy) to wait
off-hook, or, if a 
SUPERSET 4 or SUPERSET 4DN telephone is used, to
select CAMP ON, and remain off-hook until a trunk becomes free.
(When a set other than a 
SUPERSET 4 or SUPERSET 4DN telephone is
used, the user remains off-hook for 10 seconds and is automatically
camped on to the busy trunk group.) When a trunk becomes free, the
system seizes it automatically, and the previously entered digits are
automatically outpulsed. Expensive Route choices are skipped when
ARS scans for an available trunk, when honouring a camp-on.
Return Dial Tone
4.15Return Dial Tone is a programmable option which allows the
system to simulate CO dial tone for customers who consider
that its absence would confuse the users of their system. For further
information, refer to Part 5, ARS Tables, paragraph 5.04.
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							SECTION MIITLSI Q9-094-220~NAMaximum Digits Dialed
4.16The maximum number of digits that may be dialed is 26.
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							Automatic Route Selection and Toll Control
5. ARS TABLES
General5.01The ARS package is a network of tables, each of which contains
data relevant to the setting up of a trunk call, such as routing
options and 
CORs. The tables are interconnected through a series of
indices and pointers. A total of nine tables make up the ARS network.
They are, in order of programming:
ARS Digit Strings Table
ARS Nested Digit Strings Table
ARS Maximum Number of Dialed Digits.
Route Plans Table
Day Zone Definition Table
Route Lists Table
Route Definition Table
Modified Digit Table
COR Group Definition Table
5.02The hierarchy for the tables is shown in Figure 5-l. This hierar-
chy is followed by the system in deciding which routes to
select, and which users are toll-restricted on the selected routes. The
following paragraphs describe the layout and fields of each table. Refer
also to Section 
MlTL9109-094-206-NA, Installation Forms and Section
MITL9109-094-210-NA, Customer Data Entry (CDE), for further infor-
mation. The way in which the 
tab.les combine to form the ARS network
is described in general in Part 6, and in the scenario given in Part 7.
ARS Digit Strings Tables (CDE Form 26)
5.03The ARS Digit Strings tables consist of one primary table and
one nested table for each digit string in the primary table. The
nested table is accessed from the primary table by pressing the
“SHOW STRINGS” 
softkey on the Attendant Console or CDE terminal.
(Note: If no leading digits are entered on the primary table, the nested
table cannot be accessed.) The primary table permits the programming
of leading digit information. Actual digit strings and routing informa-
tion for each of the leading digit entries is programmed on the nested
table.5.04The primary table is shown in Table 5-1, and the nested table in
Table 5-2. The primary (leading digits) table is comprised of
three fields, as follows:
Leading Digits: This is essentially the same as a Trunk Group”
access code, such as the number “g”, but may be any digit
combination up to five digits in length, the customer desires to
be analyzed. A maximum of 100 leading digit combinations may
be specified.
Return Dial Tone: This field allows a simulated dial tone to be
returned to the call originator, after the “dial 9” access code for
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							SECTION MITLS% 09-094-220~NADIGIT STRINGS
MAXlMlJM DIALED
DAY
ZONES
TABLE
ROUTE
LISTS
TABLE
1ROUTETABLE
IF TRUNK
LVAILABLE ANDiALLER’S COR IS lJOT IN COR GROUP,‘RUNK SEIZEDTRUNK
GROUPMODIFIED
DIGITS
TABLE-iCDR GROUP
DEFINITION
TABLE
.Figure 5-1 ARS Table Hierarchy
7853RlElPage 16 
						

							Automatic Route Selection and Toll Control
trunks. has been received by the system, since the Central
Office dial tone is not returned until digit analysis has been
completed and a trunk seized. A YES or NO value is entered via
the appropriate softkey on the Attendant Console or CDE termi-
nal. The default value is NO.
Restricted COR Group:This field is optional, and may be
programmed with a COR Group number between 1 and 50; if no
entry is made, it defaults to a blank field. Programming a COR
Group number in this field will define which group members
will NOT be permitted to dial the specified leading digits. If
access to specified leading digits is unrestricted, the field is left
blank. For example, if all users are permitted to dial the leading
digit 
“9”, the field would be left blank. If only those peripheral
devices tagged as COR 1 are permitted to dial a given leading
digit combination, the COR Group must contain ALL 
CORs EX-
CEPT COR 1.
5.05The nested form specifies the actual digit strings which are to
be analyzed. The form is comprised of four fields; the fourth
field being subdivided into two. The fields are:
Digits to be Analyzed:Each line in this programmable field
constitutes one entry. Digits programmed in this field are used
by the system in conjunction with the leading digits to select
the appropriate Route. The following 
wildcard digits may be
specified to simplify entering the digit strings:
lNOX
0NlXl 
x,where N is any digit from 2 through 9 and X is any digit from 0
through 9.
NOX and 
NlX may ONLY be used at the BEGINNING of the digit
string; X may ONLY be used at the END of the digit string. The
wildcard digits allow for the following cases: (1) To cover rout-
ing for any area code NOT SPECIFICALLY ROUTED, NOX and 
NIXfollowed by seven digits would cover all unspecified area
codes. (2) NOX-555-1212 and 
NlX-555-1212 covers routing for
all free directory assistance calls. (3) If routes are to be se-
lected based on office codes, blocks of office codes can be
specified, as, for example, 82X, 83X, etc. The system sorts digit
strings in such a way that explicitly stated digit strings will be
routed to their routes, while all others will be covered by 
wild-cards. The ordering of digit strings is performed automatically
by CDE after each string is entered. If two routes are defined for
416 and 416-555-1212, CDE will ensure that the specific string
will occur first in the digits to be analyzed field. The number of
entries which can be made in this field is limited only by the
amount of available system memory. Up to 25 digits may be
entered as digits to be analyzed; however, the total of leading
digits, digits to be analyzed, and quantity to follow must not
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							SECTiON MITL9109-094-220-NAexceed 26 digits in length. If no digits are to be entered in the
“Digits to be Analyzed” field, the TAB key may be pressed to
permit entering information into the next field; when the line is
entered into CDE, the words “no digits to analyze” will appear
by default.
Quantity to Follow:This programmable field specifies the
number of digits to be dialed AFTER the digits to be analyzed,
and may be specified as “UNKNOWN”. The advantage of speci-
fying the quantity to follow; i.e., 9-592 
+ 4 digits, is that when
the final digit is received, outpulsing can begin, and the DTMF
receiver can be dropped; if UNKNOWN is specified, the interdigit
time-out must occur before this happens, thus tying up PABX
resources for a longer time than necessary on each call. The
total number of digits specified by this field, plus the digits to
be analyzed field, plus the leading digits (from the primary
table), must be no greater than 26 digits in length. If the quan-
tity to follow is not fixed or known, the TAB key may be pressed
to permit entering information into the next field; when the line
is entered into CDE, the word “unknown” will appear by default.
Long Distance:This programmable field is used to specify
digit strings which are to be treated as “long distance” in order
to enforce the COS option “FORCED ACCOUNT CODE ON LONG
DISTANCE CALLS”. In Generic 1003, this field is also for Room
Status Restriction in Hotel/Motel applications, to restrict long
distance calls. A caller with this COS option must have entered
an account code prior to dialing one of the designated digit
strings. A YES or NO value may be specified. If no entry is
specified, NO will be chosen as the default value.
Termination Type and Number: Digits dialed may terminate
on a Route, a Route List, or a Route Plan. These two subfields
combine to index where each valid digit string is to be found.
The first subfield is programmed with one of ROUTE, LIST, or
PLAN, depending on whether a Route, Route List, or Route Plan
is indexed. The second subfield contains the number of the
entry within the table referenced in the first subfield. For exam-
ple: Many destinations can be accessed only by direct distance
dialing (DDD). For such a destination, ROUTE is specified as the
Termination Type. Free calls such as the 555-1212 directory
assistance case (in North America) always terminate directly on
a Route for DDD. If several Route choices are available, a LIST is
specified as the Termination Type, if the choices do not vary
with time of day. A Route Plan, with Day and Time Zone vari-
ations, is not required. This situation arises where an FX route
is always preferred over DDD. In a situation where multiple
Route choices are offered, with preferences depending on time
of day and day of the week, a termination type of PLAN is
specified.
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							Automatic Route Selection and Toll Control
TABLE 5-1
FORM 26 - ARS DIGIT STRINGS TABLE - LEADING DIGITS
CDE TERMINAL DISPLAY
LEADING DIGITSRETURN DIAL TONE
NORESTRICTED COR GROUP
l-2-3-INSERT4-I5-7-LEADING DIG
a-DELETEg-SHOW STRINGS O-ENTER
ATTENDANT CONSOLE DISPLAY
LEADING DIGITSRETURN DIAL TONE
RESTRICTED COR GROUP
NO
q Fl>j3F2>q Fs>lNSERTq F4>q F5>
q F6 >QU[Tq FT>LEADING DIGq F8>DELETEq FSXHOW STRINGS I% FO>ENTER
,Page 
19 
						

							SECTION MITL9109-094-220-NATABLE 5-2
ARS DIGIT STRINGS 
- NESTED TABLE
CDE TERMINAL DISPLAY
l-2-3-INSERT4-MOX5-x
6-QUIT7-FIND STRING8-DELETE9-NIXO-ENTER
ATTENDANT CONSOLE DISPLAY
DIGITS TO BE ANALYZEDQTY TO FOLLOW
ACC CODE 
REQD
bFl>q F2>m F3>&SERTq F4>Nox
q Ffj >QUITq FT>FIND STRINGq F8>DELETEq Fg>~l)(TERM TYPE AND NUM
q F5>x
q FO >ENTERPage 20